great durable bags' 'awesome bags' 'very happy with this product' 'well made, clean and easy to use' 'just what I was looking for' 'I would recommend everyone to buy these bags'drawstring mesh media bags (4 pack) are Optimal for Activated Carbon (Carbon Sold Separately)! They are made to hold a variety of small-grained filter media such as the Aquatic Experts Classic Activated Carbon, also called bituminous charcoal, along with many different ion exchange resins.

Also works great with pelletized Carbon for ponds, or in your fish tank filter system. Since these bags are inexpensive, you can customize your filtration by adding separate bags of your favorite assortments of filter media to your canister filters, power filters, sumps, wet/dry filters and pond filters.

The drawstring tightly closes the bag and will easily keep the small media particles inside the bag without the risk of leaks. The durable drawstring design allows the bag to be used multiple times; simply empty the filter media from the bag and rinse. This universal media bag is ideal for use in any canister filter system, along with a variety of other fish aquarium filtration systems.

This POUCH should be placed so as to maximize the flow of water through the bag. Position the mesh filter bag in high flow areas such as underneath drain lines, in filters and sumps. Our mesh media bags are made to hold a variety of small-grained filter media and ion exchange resins.

Will not work for very fine resins such as Purigen and CupriSorb. Works in both freshwater and saltwater aquariums, as well as Koi Ponds. Keep your aquatic friends in your tanks happy!